High-pressure treatment apparatus

A high-pressure treatment apparatus for performing high-pressure treatment of a treatment object within a treatment chamber, comprising:

• a pressure-resistant container having a pressure-resistant wall which surrounds the treatment chamber inside and an open end which opens the treatment chamber to the outside;
• a lid member installed to said pressure-resistant container to seal the treatment chamber by closing the open end of said pressure-resistant container;
• a first supply line connected for supplying a process fluid to the treatment chamber;
• a partition wall provided along the inside surface of said pressure-resistant container while having a thickness smaller than that of the pressure-resistant wall to form a partitioned chamber with the inside surface, said partition wall fluidically isolating the partitioned chamber from the treatment chamber within said pressure-resistant container so as to prevent inflow of the process fluid from the treatment chamber to the partitioned chamber;
• and
• a heat transfer control means which controls transfer of heat between the treatment chamber and the partitioned chamber by heating or cooling a heating medium outside said container and feeding the resulting heating medium into the partitioned chamber,
• wherein said heat transfer control means includes a second line connected for feeding the heating medium into the partitioned chamber independent of the supplying of the process fluid to the treatment chamber.